Pérez-Lorenzana, A., Jaramillo, D., Ponce, W. A., ., & Arnulfo Zepeda. (1996). Symmetry breaking in [SU(6)]$^3\times$ Z$_3$. Revista Mexicana De Física, 43(5), 737–749. Retrieved from https://rmf.smf.mx/ojs/index.php/rmf/article/view/2697